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GMC Luthier Tools offer a range of pre-designed Multiscale Templates & Jigs.


The jig greatly simplifies the process of creating a multiscale fretboard. The range of jigs available is based on specifications of jigs previously supplied to customer requirements.

The jig includes everything needed for making a multiscale fretboard:


Fretboard Template & 2 Fret Slot Locators.

Slotting Jig Base.

Luthiers Fretsaw.

Geometry Layout Gauge.

In addition to our pre-designed jigs, we can provide custom jigs and templates to your requirements. Recent supply includes extra wide multiscale jigs for 10-string guitars.

Fret slotting jig template - Multiscale Guitar


The standard multiscale jig base is 715mm long and will accommodate 78mm maximum fretboard width. Wider versions can be manufactured if needed.

The jig base has a grooved rubber surface which provides firm/flexible support for the fretboard. The base features 20mm thick precision planed ash hardwood as the main component, with additional side plates incorporating the template mounting holes.


The jig base also accepts our fret scale templates for conventional guitar, baritone and bass guitar in addition to the universal fret slotting jig.

Multiscale Jig Base.JPG


The template is a custom designed and manufactured channel that fits over the outside of the jig base and rests directly on the top of the fretboard.


The template resting height can be adjusted to suit the fretboard thickness via the fastening screws & slots.


To avoid fretboard movement when cutting the slots, the fretboard blank should be trimmed for a snug fit inside the jig base side plates - (78mm).


Narrower boards can be used on the jig with some improvisation e.g. by adding some thin packers between the edges of the board and jig side plates.

The fret slot locators should be fitted after cutting initial slots at opposite ends of the board - ideally positioned at the 1st fret and last fret. These maintain alignment of the fretboard and template.


As all geometry relates to the centre of the jig, it is essential that the centreline is pencil marked on the board using the alignment marks provided on the jig for reference. 


The jig is robust enough to be clamped in a vice for use.


If there is excess board length then supplementary clamping over the top of the jig using soft clamps can be employed at the ends - subject to the particular template design.

Multiscale Fret Slotting Jig and Fretsaw
Multiscale Slotting Jig Clamp


The Layout Gauge is a valuable reference tool for the instrument build and provides the geometry and all relationships with reference to the centre line of the instrument as follows:

Nut Angle

Bridge Angle and Position

Treble Scale Length

Bass Scale Length

Nut String Spacing (Overall)

Bridge String Spacing (Overall)


Multiscale Fretboard Jig Parts_edited_edited.jpg


A precision luthiers fretsaw with hardwood handle and 5x 32tpi blades is included. Kerf Width 0.023" / 0.6mm.

The blade is guided in the template slots and the saw teeth pass through notches at the sides of the template.

Fret slot depth is achieved when the fretsaw back contacts the top surface of the template.

The fretsaw supplied – 4.5mm depth – includes an allowance for the template thickness.

Multiscale Jig Fretsaw.JPG

OPTIONAL / SUPPLEMENTARY 10" FRETSAW - With Adjustable Depth Guide

An optional 10" fretsaw can be purchased in addition to the included saw and is beneficial where a faster throughput is required or for extremely hard woods such as ebony. In some special instances for example, custom 10-string guitars, the saw will be essential and this would be highlighted at the point of enquiry.

The saw incorporates a high quality sheffield steel blade and features a precision depth guide arrangement. The saw has a walnut handle and polished brass back. The saw cuts on the return/pull stroke.


The depth guide comprises of a fixed clamp plate mounted on one side of the blade and an adjustable guide on the opposite side. Depth adjustment is made by sliding the guide along the saw blade. The depth is adjustable between 0-10mm. The guide is locked in position via two allen screws.


The depth guide is made from stainless steel and adds an additional 75% weight to the saw which also benefits cutting action particularly on longer fret slots and harder woods.


The inclined clamping slot design ensures precise adjustments can be easily made whilst keeping the guide edge parallel with the saw teeth. The feature also prevents the guide from being pushed upwards during sawing.


Saw Specification:

Kerf width - 0.022″.

No of teeth - 16tpi.

Blade Length - 10" / 254mm

0-5mm Adjustment.JPG
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